diff --git a/src/librustc_mir/borrow_check/nll/region_infer.rs b/src/librustc_mir/borrow_check/nll/region_infer/mod.rs
similarity index 100%
rename from src/librustc_mir/borrow_check/nll/region_infer.rs
rename to src/librustc_mir/borrow_check/nll/region_infer/mod.rs